The aging part of it isn't really something he has thought all that hard about. He's thought so much more about their vulnerability here. Something he has personally felt very directly that time he got shot, but it has also been on his mind because of Snow and Connor. Bigby may care very little about the state of his own body, but the thought of something happening to either of them has been haunting his mind. It still is now, even with Connor gone, even with Snow having been - thankfully - relatively alright during her stay here.

"Might be," he replies. Not sounding too worried about it, but not too happy either. It's just a fact Bigby is momentarily taking in as he looks sidelong at her.

"Why? You think I'm starting to go grey?"